Reamer



Mar. 13, 1923.

W. E. KELLY REAMER Filed NOV. 22, 1920,

//7 van/ar- M ////s'//7 EA? inclined face 15 at tion, readily adjustable,

- slits and is divided Patented Mar. 13, 1923.

nrr l 5T WILLIAM n-KELLy, oriorinvnizann, onro,"

f READ/LEE." -1

' I A pncamn filed November 22,1920. seriaijnof ieas i To all whom it may concern: 1

Be it known that I, VViLLrA E. KELLY, a citizen of the United'States, and resident of Cleveland, county of Cuyahoga, and ,State of Ohio, have invented a new and useful Reamer, of which the following is a specifica-tion. v

My invention relates. to reamers which have adjustably insertedcuttingblades.

' Reamers with inserted blades have bcen made but the constructions heretofore devised have many disadvantages; for instance the blades loosen while in operation, cumbersome or ineiiicient adjusting mechanism, expensive construction, etc. Y

The object of my, invention is to overcome the disadvantages now found in similartools and provide a reamer of simple construcjpositivein maintaining its adjustment, and economic of manufacture and of operation.

My invention is clearlyillustratedin the accompanying drawing iwherein Fig. 1 is a side view of a reamer partly broken away to line 1-1 of Fig. 2' to show' the construction clearly; Fig. 2 is a sectionon line 2-2 of Fig. 1; Fig. 3 is a section on line 3-3 of Fig.1; and Fig. 4 is a side view of a modification partly broken away to a line substantially corresponding toline 4 -4: of- Fig. 2. a I r Similar reference characters referfto similar parts throughout the views.

vReferring particularly to Figs. 1, 2, and 3 which show an adjustable reamer composed of a body '5 having the-shank 6, cutters- 7, ring 8, washer'9, lockhut 10, and clamp screws 11. 1 1 y The body 5, made of suitable material and contour, has the slots 12 which haveira'dially parallel wallsend an. inclined bottom, the threaded portion 13, and the keyway 14. The shank 6 may be formed to any desired contour and length. The body 5 also has at the front end; further description and the purpose thereof will appear presently.

Each cutter 7 made of suitable material, fits snugly into one of the slots 12, has an inclined bottom corresponding to the inclination of the bottom of the slots 12, an the rear end, av cutting face 16, and is suitably hardened;

The ring 8, made of suitable material, has a threaded opening portion 13 on the body 5, the inclined face I the spanner holes appropriate .to prevent the screws 'llfrom working into its front end. bility to thefront endof the body 5, the

fitting to the threaded 17 the Finch nation which corresponds to the inclination of the'faces 15 on the rear ends of the cutters 7,-and is knurled andhas 18 to facilitate its ma nipulation. The part 8 is named 'ring since it performs the functions of adjusting the cutters longitudinally, of forming an abutment for the rear endof the cutters, and

cutters down and a name p to all of these functions is not availablen It will be seen that the face 17 of holding the rear end of the upon the bottom ofthe slots,

on the ring 8 as well as the faces 15 on the cutters 7 are inclined more to the'radial than to the horizontal axis of the reai'ner, pose thereof being'to provide an as nearly as possible square abutment between the cutters 7" and the ring 8 but have suflicientinclinatio'n there to hold therear end of the down po thefbottoms' or the slots-12.

The washer 9,

fits over the top of the threads of the threaded portion 13,-and also'hasthe ear 19-pro jecting into this opening and fitting into the 'keyway 14:; 1- i i The lock vnut 10, made of suitable material,

has a threaded opening'fitting to the threaded' port on13 on thebody 5.-

the purmade of suitable material and thlckness', has a central" opening which i 8 The 'clamp screws 11, made of suitable material, are threaded into the body 5 and have the taperedzjhead 20; It will beseen that the taper on ther'hcad 20gis comparatively slighty the objectwthereof being to exerta high pressuresidewise against the divided 'body' portions with a comparatively low turningmornent of the screws 11, and

v loose while "the. reaincr is in" operation. These screws 1 1. are disposed; "near the front end of the body 5 and between alternate pairs of cutters as clearly seen in Fig. 2 i

In line with the screwsll, has the division slits 21 cut some distance To provide more flexirelief slits '25 may also be provided The modification shown in Fig. 1 1s simithe body 5 lar to Fig. 1 except that the shank 6 is omitted and the opening 22 isprovided to receive a shank to the end that this reamer merely changing the comparatively inexpensive shank. Since all other may be used in a variety of machines by I y detailed. mention of these parts isthought necessary and the numeralsemployed to designate the parts of the previously described reamer have been usedto designate corresponding parts in the modification.

The operation of this reamer is as follows: After the parts are made up and assembled as shown,. which is the smallest size the reamer will ream since the faces 23, on the cutters and on the ring, are touching, and it is desired to .adjustthe reamer to a largerisize, it is only necessary to release the screws 11, then rotate the ring,

F- keyway 14, is interposed between the lock nut and the ring and prevents rotation of the latter whenthe former is rotated.

When tightening the clamp screws 11, the division slits 21 will open, due to the tapered head 20, and force the divisions of the body outward at the points 24 and thereby clamp the cutters tightly against the walls of the slots.

In order to further facilitate this clamping of the cutters, the relief slits 25 may be cut into the front end of the body similar to the slits 21 but, preferably, from the bottom of the slots inwardly as shown in Fig. 2. This further division of the front end of the body provides more flexibility to the portions 27 and materiallyincreases the efficiency of the clamping mechanism.

H hile the reamer is in use as well as while the cutters arebeing adjusted, the faces 15 of the cutters abut on the faces 17 of the ring 8; if these faces 15 and 17 are inclined too much to the horizontal axis of the reamer, the longitudinal movement of the ring 8 has a tendency to wedge the rear end of the cutters downward and lift the front end thereof off of the bottoms of the slots. Therefore, the inclination of the faces 15 and 17 should be arranged so that the cutters are prevented from leaving the bottom of the slots while adjusting the cutters but have suflicient angularity to hold the same down upon the bottom of the slots. When the reamer is adjusted andlocked, thefring 8 forms. a longitudinal abutment for the cutters and also holds them down upon the bottom of the slots in addition to the function of moving the cutters longitudinally while adjusting the same.

The bottoms of the slots and of the cut ters may be made parallel withthe-longitudinal axis of the reamer when it is desired to construct a diametrically non-adjustable reamer but wherein the cutters can be adjusted longitudinally to the end that the front face of the cutters may be adjusted to any desired distance outside oflthe front end of the body; to face the bottom of a hole for instance, or when grinding-the front face of the cutters.

Without limiting myself to the precise construction shown and described,

I claim:

1. A reamer comprising a body provided with slots'and with a division slit between each alternate pair of these slots and with a relief slit terminating in each of these slots, a cutter in each of said slots, and .a cone headed screw/through each of said division slits and threaded into said body and adapted to force the front and divided portions of said body against said cutters.

2. A reamer comprising a body provided with slots extending the entire length of the main body portion and with a division slit between each alternate pair of these slots and extending part way into the front end of this body and with a relief slit terminating in each of these slots and extending partway into the front end of this .body, and a cone headed screw through each of said division slits and threaded into said body and adapted to force the frontv and divided portions of said body against said cutters.

. E. KELLY. 

